I have an Autometer tach mounted on the steering column. When I turn on the lights the tach goes dead. It work fine last year. I changed engines last week and had to unhook MSD and all but I thought I got it all plugged back in right. Thanks, Rick...
Your tach wiring should be - White to dash lights - red to ignition - black to ground - green to MSD tach terminal. I run the white wire to a toggle switch then to the acc. terminal on the fuse block on my car
The biggest problem, according to Autometer, with tach installations, is the lack of a good ground. Autometer recommends grounding the tach to the intake manifold. The old sheet metal screw in the firewall is a no-no. I am relaying this from experience !
Advanced Automotive Machine
A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!